servlet.java

php-4.4.7学习linux时下载的源代码

/*
   +----------------------------------------------------------------------+
   | PHP Version 4                                                        |
   +----------------------------------------------------------------------+
   | Copyright (c) 1997-2006 The PHP Group                                |
   +----------------------------------------------------------------------+
   | This source file is subject to version 3.01 of the PHP license,      |
   | that is bundled with this package in the file LICENSE, and is        |
   | available through the world-wide-web at the following url:           |
   | http://www.php.net/license/3_01.txt                                  |
   | If you did not receive a copy of the PHP license and are unable to   |
   | obtain it through the world-wide-web, please send a note to          |
   | [e-mail] so we can mail you a copy immediately.               |
   +----------------------------------------------------------------------+
   | Author: Sam Ruby ([e-mail])                                  |
   +----------------------------------------------------------------------+
*/

/* $Id: servlet.java,v 1.19.8.1.8.1 2006/01/01 13:47:02 sniper Exp $ */

package net.php;

import java.io.IOException;
import java.net.URLEncoder;
import java.util.Enumeration;
import javax.servlet.*;
import javax.servlet.http.*;

import java.lang.reflect.Method;

public class servlet extends HttpServlet {
  char slash = System.getProperty("file.separator").charAt(0);

  HttpServletRequest  request;
  HttpServletResponse response;
  ServletInputStream  stream;

  static int startup_count = 0;

  protected boolean display_source_mode = false;
  private Method addHeader;

  // Native methods

  public native void startup();
  public native long define(String name);
  public native void send(String  requestMethod,
                          String  queryString,
                          String  pathInfo,
                          String  pathTranslated,
                          String  contentType,
                          int     contentLength,
                          String  authUser,
                          boolean display_source_mode
                         );
  public native void shutdown();

  // SAPI Callbacks

  public String readPost(int bytes) {
    String result;

    if (!request.getMethod().equals("POST")) {
      result = request.getQueryString();
    } else { 
      Enumeration enum = request.getParameterNames();
      String concat = "";
      result = "";

      while (enum.hasMoreElements()) {
        String name  = (String)enum.nextElement();
        String value = request.getParameter(name);

        try {
          result += concat + name + "=" + URLEncoder.encode(value, "UTF-8");
        }

        catch (Exception e) {
          e.printStackTrace(System.err);
        }

        concat = "&";
      }
    }

    if (result == null) return "";

    return result; 
  }

  public String readCookies() {
     reflect.setResult(define("request"),  request);
     reflect.setResult(define("response"), response);
     reflect.setResult(define("PHP_SELF"), request.getRequestURI());

     return request.getHeader("cookie");
  }

  public void header(String data) {
    // try to send the header using the most specific servlet API
    // as possible (some servlet engines will add a content type
    // header unless the setContentType method is called).
    try {
      if (data.startsWith("Content-type: ")) {
        response.setContentType(data.substring(data.indexOf(" ") + 1));
      }

      else if (data.startsWith("Location: ")) {
        response.sendRedirect(data.substring(data.indexOf(" ") + 1));
      } else if (data.startsWith("HTTP/1")) {
      	return; // this one is added from servlet container (Tomcat 4.1), we have to check for others
      }

      else {
        int colon = data.indexOf(": ");

        if (colon > 0) {
          try {
            addHeader.invoke(response, new Object[]
              { data.substring(0, colon), data.substring(colon + 2) } );
          }

          catch (Exception e) {
            e.printStackTrace(System.err);
          }
        }

        else {
          write(data);
        }
      }
    }

    catch (IOException e) {
      e.printStackTrace(System.err);
    }
  }

  public void write(String data) {
    try {
      response.getWriter().print(data);
    }

    catch (IOException e) {
      e.printStackTrace(System.err);
    }
  }

  // Servlet interface

  public void init(ServletConfig config)
  throws ServletException {
    super.init(config);

    // first time in, initialize native code
    if (0 == startup_count++) {
      reflect.loadLibrary("servlet");
      startup();
    }

    // try to find the addHeader method (added in the servlet API 2.2)
    // otherwise settle for the setHeader method

    try {
      Class c = Class.forName("javax.servlet.http.HttpServletResponse");
      Method method[] = c.getDeclaredMethods();

      for (int i = 0; i < method.length; i++) {
        if (method[i].getName().equals("addHeader")) {
          addHeader = method[i];
          break;
        }

        if (method[i].getName().equals("setHeader")) {
          addHeader = method[i];
        }
      }
    }

    catch (Exception e) {
      e.printStackTrace(System.err);
    }
  }

  public void service(HttpServletRequest request, HttpServletResponse response, String contextPath)
  throws ServletException {
    this.request  = request;
    this.response = response;

    send(request.getMethod(),
         request.getQueryString(),
         request.getRequestURI(),
         contextPath,
         request.getContentType(),
         request.getContentLength(),
         request.getRemoteUser(),
         display_source_mode
        );

    try {
      if (stream != null) stream.close();
    }

    catch (IOException e) {
      throw new ServletException(e.toString());
    }
  }

  public void service(HttpServletRequest request, HttpServletResponse response)
  throws ServletException {
    String servletPath = request.getServletPath();
    String contextPath = getServletContext().getRealPath(servletPath);

    service(request, response, contextPath);
  }

  public void destroy() {
    if (0 == --startup_count) shutdown();
    super.destroy();
  }
}